Forged Aluminum Alloy Wheel+ceramic Coating Surface Treatment

The mainstream implementation path of ceramic coatings in industry is micro arc oxidation (PEO/MAO, also known as plasma electrolytic oxidation), which is compared with traditional hard anodizing (Type III) as follows:

Performance indicators Ceramic coating (PEO/MAO) Hard anodizing (Type III)
The maximum hardness of the film layer is 2500 HV, approximately 600 HV
Salt spray resistance can reach up to 2000 hours, but chemical resistance is limited
Film thickness 8-200 μ m 25-75 μ m
Excellent thermal stability, limited application as thermal barrier layer, and may degrade at high temperatures
Fatigue has no adverse effects and can reduce fatigue strength by 8% -62%
Color consistency Delta E ≤ 1, batch stability is prone to batch color difference
Applicable alloys can handle difficult to oxidize alloys such as high silicon die cast aluminum, but have poor effects on high silicon/high copper alloys
High processing cost (large equipment investment), low cost, mature standardization.

 The key difference lies in the fact that PEO operates under conditions "higher than the breakdown voltage"(traditional anodizing only 10-50V), and generates an oxide ceramic composite film layer in situ through micro plasma discharge, resulting in much higher hardness, wear resistance, and thermal stability than traditional oxide films. But the equipment investment and processing cost are about 2-3 times that of anodizing, and currently it is mainly used in high-end commercial vehicles, aerospace, defense and other fields that require strict performance.